The method of restriction of trail and restricting device of trail.

摘要

Abstract invention patent: "method of restriction of trail and restricting device of trail".At the time of forced cooling of the upper portion (11) and a lower portion (13) of a cold rolled rail (10).A predetermined position 2 meters from each of both sides of the rail terminals (10) along the longitudinal direction of the rail (10) is defined as a first position restriction.A predetermined position 3 to 10 feet from the first position restriction in one direction to the center of the rail (10) along the longitudinal direction of the rail (10) is defined as a secondThe position of the restriction.And the displacement of the rail (10) in a vertical direction is restricted in the first position restriction and in the second position restriction by a force of restriction on f (KN) that satisfies a condition predeComplete.